An Emulated PV Source Based on an Unilluminated Solar Panel and DC Power Supply

Zhou, Zhongfu; Macaulay, John

doi:10.3390/en10122075

Cited by 19 publications

(15 citation statements)

References 33 publications

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“…In the concrete case of the photovoltaic cell the analytical model opens the doors for the detailed description in function of the external variables, which for all effects determine the general forms of the characteristic curves. However, to make modeling effective, it will be the model's intrinsic parameters which will more or less shape the link to the experimental data [18]. Molding is particularly critical at three points of operation.…”

Section: Introductionmentioning

confidence: 99%

“…In [27] the authors optimize the MPPT with a model of a photovoltaic panel with two diodes in which the solution is implemented by Pattern Search Techniques. A PV source that was made by utilizing un-illuminated solar panels and a DC power supply that functions in current source mode is proposed in [18]. The authors in [28] address a simple genetic algorithm (GA)-based MPPT method and then compare the experimental and theoretical results with conventional methods.…”

Section: Introductionmentioning

confidence: 99%

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Simulation and Comparison of Mathematical Models of PV Cells with Growing Levels of Complexity

Rodrigues¹,

Godina

Marzband

et al. 2018

Energies

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The amount of energy generated from a photovoltaic installation depends mainly on two factors—the temperature and solar irradiance. Numerous maximum power point tracking (MPPT) techniques have been developed for photovoltaic systems. The challenge is what method to employ in order to obtain optimum operating points (voltage and current) automatically at the maximum photovoltaic output power in most conditions. This paper is focused on the structural analysis of mathematical models of PV cells with growing levels of complexity. The main objective is to simulate and compare the characteristic current-voltage (I-V) and power-voltage (P-V) curves of equivalent circuits of the ideal PV cell model and, with one and with two diodes, that is, equivalent circuits with five and seven parameters. The contribution of each parameter is analyzed in the particular context of a given model and then generalized through comparison to a more complex model. In this study the numerical simulation of the models is used intensively and extensively. The approach utilized to model the equivalent circuits permits an adequate simulation of the photovoltaic array systems by considering the compromise between the complexity and accuracy. By utilizing the Newton–Raphson method the studied models are then employed through the use of Matlab/Simulink. Finally, this study concludes with an analysis and comparison of the evolution of maximum power observed in the models.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simulation and Comparison of Mathematical Models of PV Cells with Growing Levels of Complexity

Rodrigues¹,

Godina

Marzband

et al. 2018

Energies

View full text Add to dashboard Cite

show abstract

“…A further method is based on the use of an analog amplification technique that allows to independently amplify the low current and voltage values typical of a photodiode operating in the photovoltaic mode so as to make them coincide with those of a standard photovoltaic module [8,9]. Since this type of emulator is made entirely with analog components, it has a high bandwidth, which allows using this circuit to test photovoltaic inverters with maximum power point tracker (MPPT) algorithms operating at high frequency [10][11][12]. On the other hand, the main disadvantage of this circuit is the high power dissipation that involves the use of heat sinks with a large surface area.…”

Section: Introductionmentioning

confidence: 99%

“…Another method builds an equivalent photovoltaic source using an unlighted photovoltaic panel and a DC current power supply [10]. However, this approach requires the use of an actual PV panel that must be changed if it is necessary to emulate a different panel; also, the temperature effect is not easily simulated.…”

Section: Introductionmentioning

confidence: 99%

Simple and Low-Cost Photovoltaic Module Emulator

et al. 2019

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The design and testing phase of photovoltaic (PV) power systems requires time-consuming and expensive field-testing activities for the proper operational evaluation of maximum power point trackers (MPPT), battery chargers, DC/AC inverters. Instead, the use of a PV source emulator that accurately reproduces the electrical characteristic of a PV panel or array is highly desirable for in-lab testing and rapid prototyping. In this paper, we present the development of a low-cost microcontroller-based PV source emulator, which allows testing the static and dynamic performance of PV systems considering different PV module types and variable operating and environmental conditions. The novelty of the simple design adopted resides in using a low-cost current generator and a single MOSFET converter to reproduce, from a fixed current source, the exact amount of current predicted by the PV model for the actual load conditions. The I-V characteristic is calculated in real-time using a single diode exponential model under variable and user-selectable operating conditions. The proposed method has the advantage of reducing noise from high-frequency switching, reducing or eliminating ripple and the demand for output filters, and it does not require expensive DC Power source, providing high accuracy results. The fast response of the system allows the testing of very fast MPPTs algorithms, thus overcoming the main limitations of state-of-art PV source emulators that are unable to respond to the quick variation of the load. Experimental results carried on a hardware prototype of the proposed PV source emulator are reported to validate the concept. As a whole result, an average error of ±1% in the reproduction of PV module I-V characteristics have been obtained and reported.

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“…With an actual PV array on site, it is necessary to alter the series/parallel combination of PV modules for testing different rated PV power conditioning systems. Hence a PV simulator is required to validate the solar power conditioning system at the laboratory level itself before any actual site trials [1,2]. A PV-simulator system is a DC power source in which the current-voltage (I-V) characteristics of different PV arrays can be programmed so that the operation of the solar power conditioning system can be validated.…”

Section: Introductionmentioning

confidence: 99%

Design and Controller-In-Loop Simulations of a Low Cost Two-Stage PV-Simulator

et al. 2018

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A PV-Simulator is a DC power source in which the current-voltage (I-V) characteristics of different PV arrays can be programmed. With a PV-simulator, the operation of the solar power conditioning systems can be validated at a laboratory level itself before actual field trials. In this work, design, operation and controls for a two-stage programmable PV-simulator required for the testing of solar power conditioning systems are presented. The proposed PV-simulator consists of a three-level T-type active front-end converter in the first stage and a buck-chopper-based DC-DC converter in the second stage. An active front-end rectifier using a three-level T-type IGBT-based converter is used at the input stage to help in operating the system at unity power factor. A DC-DC converter at the output stage of the simulator is regulated to obtain the I-V characteristics of the programmed PV-Array. Hardware-In-Loop simulations are carried out to validate the proposed system and the associated controls implemented in the controller. As a case study, this PV-simulator is programmed with electrical parameters of a selected PV-array and the characteristics obtained from the PV-simulator are compared with the actual PV-array characteristics. The dynamic response of the system for sudden changes in the load and sudden changes in irradiance values are studied.

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An Emulated PV Source Based on an Unilluminated Solar Panel and DC Power Supply

Cited by 19 publications

References 33 publications

Simulation and Comparison of Mathematical Models of PV Cells with Growing Levels of Complexity

Simulation and Comparison of Mathematical Models of PV Cells with Growing Levels of Complexity

Simple and Low-Cost Photovoltaic Module Emulator

Design and Controller-In-Loop Simulations of a Low Cost Two-Stage PV-Simulator

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